2.2.1 Communications Setup
The testing environment includes a communications server known as a utility server, in order to expose the appropriate HTTP end-points to implement all tests as described in Sections 3 and 4 of this document.
The utility server may implement a utility-side client with support for subscription and notification use- cases, in order to test conformance of aggregator clients against these requirements.
2.2.2 ELECTRICAL SETUP
The following components are used for electrical testing and verifying conformance of communications clients with CSIP-AUS, as shown in Figure 2:
a) A DER or set of DERs to be tested that can receive commands from a communications client;
b) A site meter that measures site import/export and communicates this to the communications client;
c) An optional power analyser to measure relevant parameters at the connection point for independent verification;
d) An additional optional power analyser for each DER under test to measure device-specific parameters for independent verifications;
e) A test load that isn’t managed by the communications client, which is capable of consuming at least 500W per phase or 50% of the inverter rated active power, whichever is smaller;
f) Power sources(s) or sink(s) for DER to function; and
g) A real grid or simulated test grid set to 230V +/- 2.3V% and 50Hz +/- 0.5Hz.

Figure 2 - Electrical test setup